dude i have a 12 page term paper due and i'm like, "yea i can totally bang this out." now i'm sitting on funnyjunk typing you this message to let you all know that this happens to everyone.
Pic related: its essentially what i have done so far

i had the same situation just yesterday. except when i got to school i realized: a) that i hadnt done any revising/editing from my rough draft and b) left my flash drive at home with the rough draft on it. i had my friend drive me back home at the beginning of my 5th period (my periods are 45 minutes long), i got back to school 10 minutes before 6th period, and got most of the needed changes done in time to print it out and hand it at the beginning of 7th period.